Air hammer



FIG. 1 a front elevation view of an air hammer embodying my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front and left side perspective view thereof. 

CLAIM The ornamental design for an air hammer, as shown and described. 